|The Public Paperfolding History Project
|Tractatus de Sphaera Mundi by Johannes de Sacrobosco, 1498|
'Tractatus de Sphaera Mundi' by Johannes de Sacrobosco (a name used by John Holywood, an English mathematician and astronomer) was first published in c1230.
An edition published in Paris in 1488 (not Venice in 1490 as previously stated - my thanks to Michael Assis for pointing out this error) contains a picture illustrating a solar eclipse which, quite oddly and incidentally, seems to show two paper boats floating in a stylised sea.
For comparison, the equivalent illustration found in the Venice 1490 edition lacks this detail.